Hi Charlie, I'd say forget about the VC properties when using it as a negative.
The 'VC' is made during printing. I always use a non VC but thats only because I came by a cheap box at a market. Also, the one I use is a RC paper, from my experience most papers are about 4 ASA. Once the exposure is made and it is developed, I usually peel the paper backing off very slowly so as to allow shorter exposures at the printing stage. Of course they do curl severely once this is done. Also, I have heard that if VC is printed without a filter, it produces grade 2. Maybe this will be the same when it is used as a paper negative? Other APUG'ers may have a different opinion re VC papers? Good Luck! - David.